Mitsubishi Eclipse 1990-1998 Repair Guide

Spark Plug Wires


Improper arrangement of the spark plug cables will induce voltage between the cables, causing misfiring and developing a surge at acceleration in high-speed operation. Therefore, be careful to arrange the spark plug cables properly.


See Figure 1

At every tune-up/inspection, visually check the spark plug cables for burns cuts, or breaks in the insulation. Check the boots and the nipples on the distributor cap and/or coil. Replace any damaged wiring.

Every 50,000 miles (80,000 Km) or 60 months, the resistance of the wires should be checked with an ohmmeter. Wires with excessive resistance will cause misfiring, and may make the engine difficult to start in damp weather.

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Fig. Fig. 1: Measuring the resistance of spark plug cable using a volt/ohmmeter

  1. Remove the spark plug cable from the engine.
  3. Check the cap and the coating of the cable for cracks. Replace the cable if cracks are present.
  5. Using a volt ohmmeter, measure the resistance of the wire. Compare the measured resistance to following the desired values:

1.8L Engine

Spark plug cable No. 1-10.1K ohms
Spark plug cable No. 2-11.5K ohms
Spark plug cable No. 3-12.0K ohms
Spark plug cable No. 4-13.0K ohms

1990-94 2.0L Engines

Spark plug cable No. 1-5.8 ohms
Spark plug cable No. 2-8.4 ohms
Spark plug cable No. 3-10.6 ohms
Spark plug cable No. 4-9.7 ohms

1995-98 2.0L Non-turbo Engines

Spark plug cables No. 1-4-8K ohms.

1995-98 2.0L Turbo and 2.4L Engines

Spark plug cables No. 1-4-22K ohms

  1. If the measures resistance differs from the desired values, replace the spark plug cable. It is recommended that all cables be replaced if 1 wire need be replaced.


To avoid confusion, always replace spark plugs one at a time.

  1. Disconnect the negative battery cable.
  3. If equipped, remove the center cover.
  5. Remove the spark plug cable from the spark plug by holding the wire on the cap and twisting slightly while pulling the wire straight out.
  7. With the cable removed from the spark plug, unfasten the wire from the retainers. Note the exact position of the wires to assure they are installed in the same position during installation.
  9. Remove the cable end from the ignition coil or distributor cap, as applicable.

To install:
  1. Install the cable over the spark plug and push until securely seated.
  3. Install the cables securely in the retainers in the same position as removed. Make sure the cables are securely installed to avoid possible contact with metal parts. Install the cables neatly, ensuring that they are not too tight, loose, twisted or kinked.
  5. Install the cable end onto terminal of the ignition coil or distributor cap, as equipped.
  7. Repeat this procedure on the remaining spark plug cables until all have been replaced.
  9. If equipped, install the center cover and tighten the fasteners to 2.5 ft. lbs. (3.5 Nm).
  11. Connect the negative battery cable.